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Software ==> | SQL (203 exercises) |
Topic ==> | Scalar functions (9 exercises) |
Level ==> | Harder than average |
Subject ==> | SQL training |
This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.
First (if you haven't already done so) run the script shown above to generate the Doctor Who training database.
See how many of the following functions you can create in the time left to you!
-- show all these functions working
SELECT
EpisodeId,
Title,
-- function to count number of companions for a given episode
dbo.fnNumberCompanions(EpisodeId) AS Companions,
-- function to count the number of enemies for an episode
dbo.fnNumberEnemies(EpisodeId) AS Enemies,
-- function to count the number of words (hint: use a combination
-- of LTRIM and RTRIM to remove leading and trailing spaces, then
-- REPLACE to change all spaces to empty strings and compare the
-- LEN of the string before and after this change!)
dbo.fnWords(Title) AS Words
FROM
tblEpisode
ORDER BY
Words DESC
Here's what you should see when you run the query, if you manage to create all of the functions listed:
Four episodes have 7 words each.
When (if?) you finish, optionally save your query as Too many functions.sql, then close it down.
You can find other training resources for the subject of this exercise here:
Kingsmoor House
Railway Street
GLOSSOP
SK13 2AA
Landmark Offices
99 Bishopsgate
LONDON
EC2M 3XD
Holiday Inn
25 Aytoun Street
MANCHESTER
M1 3AE
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